Let's divide 10399570 by 25
We want to divide 10399570 by 25.

Going ahead to step 1:
25 can be fit into 1 0 times, resulting in a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Take the next digit (0) from the dividend and append it to 1, then repeat: 10 / 25

On to step 2:
25 can be fit into 10 0 times, resulting in a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 10 to get 10.
Bring next digit (3) of the dividend behind the 10 and repeat the process: 103 / 25

Let's proceed to step 3:
When dividing 103 by 25, we get 4 with a remainder of 3.
The next digit of our result is 4. 
Result so far: 4.0
Deduct 100 from 103 and we're left with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 25

Going ahead to step 4:
39 divided by 25 is 1 with a remainder of 14.
The next digit of our result is 1. 
Result so far: 41.0
Subtract 25 from 39 to get 14.
Include the next digit (9) from the dividend after 14, then repeat: 149 / 25

Let's proceed to step 5:
When dividing 149 by 25, we get 5 with a remainder of 24.
The number 5 becomes the next digit in our result. 
Result so far: 415.0
If we take 125 away from 149, we end up with 24.
Fetch the next digit (5) from the dividend, attach it to 24 and continue: 245 / 25

Step 6:
245 divided by 25 is 9 with a remainder of 20.
Write down 9 as next digit of the result. 
Result so far: 4159.0
The remainder is 20 after subtracting 225 from 245.
Append the next digit (7) from the dividend to 20 and continue with: 207 / 25

Moving on to step 7:
25 goes into 207 8 times with a remainder of 7.
The next digit of our result is 8. 
Result so far: 41598.0
Deduct 200 from 207 and we're left with 7.
Take the next digit (0) from the dividend and append it to 7, then repeat: 70 / 25

Step 8:
The number 25 fits into 70 2 times, leaving a remainder of 20.
Write down 2 as next digit of the result. 
Result so far: 415982.0
The remainder is 20 after subtracting 50 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Let's proceed to step 9:
When dividing 200 by 25, we get 8 with a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 415982.8
If we take 200 away from 200, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 10:
25 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 415982.8
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 11:
25 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 415982.8
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 415982.8, and the remainder is 0.0.